The U.S. recently passed a grim milestone: 200,000 deaths from the coronavirus pandemic. While case rates in many states have been in decline, there have also been outbreaks in others. Join us for a discussion with Dr. Amesh Adalja, a well-known pandemic preparedness expert. We'll discuss the latest news about the prospects for a vaccine, new developments in testing technology, as well as what the latest science is telling us about controversies about masks and "herd immunity."